No Help what so ever

Can someone please urgently assist me, I bought 2 new HD decoders on the 21 December 2017 installed on the 21 December 2017. Called DSTV to activate services on my new HD decoders and deactivate on my old Decoder.I immediately got the error E16.I called the Call center they cleared it,I tried to change channels and boom, E16 again, call the call center again they clear it, change channels BOOM E16 all over again, I have spent hours on the phone with the call centers and still no one can fix this So I have 2 HD decoders that I am paying money for , a telephone bill that is rising everyday as each call is about 20 min to clear the E16 error,No one is willing to call me back even when I tell them I have been calling numerously.How can this be resolved SOONER THAN LATER ????????